A boiler high temperature gas waste heat recovery device

Abstract

The utility model relates to the field of boiler technology, and in particular to a boiler high-temperature gas waste heat recovery device. The utility model provides a boiler high-temperature gas waste heat recovery device that can replace cooling pipes without stopping the machine, facilitates the inspection and maintenance of the cooling pipes, and improves the efficiency of the boiler high-temperature gas waste heat recovery. A boiler high-temperature gas waste heat recovery device includes a fixed frame, a box body, and an air intake fan, etc. There are two left and right fixed frames, and the box body is rotatably connected between the fixed frames, and the inner sides of the left and right parts of the box body are rotatably connected to the air intake fans. The utility model rotates the box body on the fixed frame so that the heat exchange pipe rotates to a vertical state, so that the docking port on the isolation ring is docked with the water outlet of another group of cooling pipes, thereby achieving the effect of being able to replace the cooling pipes without stopping the machine, facilitating the inspection and maintenance of the cooling pipes, and improving the efficiency of the boiler high-temperature gas waste heat recovery.

Description

Technical Field

[0001] The utility model relates to the technical field of boilers, in particular to a boiler high-temperature gas waste heat recovery device. Background Art

[0002] The recovery of waste heat from boiler high-temperature gas is a very important part of the boiler operation process. It involves the effective use of energy and environmental protection and emission reduction. The boiler high-temperature gas contains a large amount of heat energy. If it is not recovered, this heat energy will be directly discharged into the environment, causing energy waste.

[0003] The existing boiler high-temperature gas waste heat recovery device usually passes the high-temperature gas in the boiler into a heat exchange device, and transfers the waste heat in the boiler to a cooling pipe through the heat exchange device. However, due to wear, corrosion and other reasons during the long-term use of the cooling pipe, it needs to be repaired or replaced. However, the existing cooling pipe replacement method requires complex operations such as shutdown and disassembly, which not only affects the boiler high-temperature gas waste heat recovery efficiency, but also increases maintenance costs.

[0004] Therefore, a boiler high-temperature gas waste heat recovery device has been developed that can replace the cooling pipe without stopping the machine, facilitates the maintenance of the cooling pipe, and improves the boiler high-temperature gas waste heat recovery efficiency. Utility Model Content

[0005] In order to overcome the shortcomings of the existing cooling pipe replacement method that requires complex operations such as shutdown and disassembly, which not only affects the boiler high-temperature gas waste heat recovery efficiency but also increases maintenance costs, the utility model provides a boiler high-temperature gas waste heat recovery device that can replace the cooling pipe without stopping the machine, facilitates the maintenance of the cooling pipe, and improves the boiler high-temperature gas waste heat recovery efficiency.

[0006] Technical solution: A boiler high-temperature gas waste heat recovery device includes a fixed frame, a box body, an air intake fan, a heat exchange tube, a filter plate and a reversing mechanism. There are two left and right fixed frames, and the box body is rotatably connected between the fixed frames. The inner sides of the left and right parts of the box body are rotatably connected to the air intake fans. The middle part of the box body is connected to multiple heat exchange tubes, and the upper and lower sides of the middle part of the box body are connected to the filter plates. The box body is provided with a reversing mechanism that can switch the cooling pipes.

[0007] In a preferred embodiment of the utility model, a temperature sensor is also included, and the left and right parts of the box body are both connected to the temperature sensor.

[0008] In a preferred embodiment of the utility model, a path plate is also included. The inner side of the middle part of the box body is connected to the upper and lower path plates. The path plates are all L-shaped structures, which can guide the high-temperature gas and increase the contact and heat exchange time between the high-temperature gas and the heat exchange tube.

[0009] In a preferred embodiment of the utility model, the reversing mechanism includes a rotating frame, an isolation ring, a water outlet and an ash hopper. The rotating frame is connected between the fixed frames, the rotating frame is located on the outside of the box body, and multiple water outlets are connected to the rotating frame. The isolation ring is connected to the outside of the middle part of the box body. Cover plates are provided on the inner sides of the left and right parts of the isolation ring, and the cover plates cooperate with the heat exchange tubes. Docking ports are provided on the outer sides of the left and right parts of the isolation ring, and the docking ports cooperate with the water outlet. Ash hoppers are connected to the upper and lower sides of the box body.

[0010] In a preferred embodiment of the utility model, a cleaning mechanism is also included, which includes a hydraulic cylinder, a cleaning plate and a vibration frame. The left and right parts of the box body are connected to two upper and lower hydraulic cylinders, and the telescopic ends of the hydraulic cylinders are connected to the cleaning plates. The heat exchange tubes are slidably connected to the cleaning plates. The inner sides of the left and right parts of the box body are connected to two upper and lower vibration frames, and the vibration frames are in contact with the cleaning plates.

[0011] In a preferred embodiment of the present invention, the vibration frame is a wave-shaped structure.

[0012] Compared with the prior art, the utility model has the following advantages: 1. The utility model rotates the box body on the fixed frame to rotate the heat exchange pipe to a vertical state, so that the docking port on the isolation ring is docked with the water outlet of another group of cooling pipes, so that the cooling pipe can be replaced without stopping the machine, which is convenient for maintenance of the cooling pipe and improves the efficiency of waste heat recovery of high-temperature gas in the boiler.

[0013] 2. The utility model starts the hydraulic cylinder on the box body to push out the telescopic end of the hydraulic cylinder, so that the cleaning plate slides forward to scrape off the impurities attached to the heat exchange tubes, thereby achieving the effect of scraping off the impurities attached to the heat exchange tubes and the box body, avoiding the decrease in heat exchange efficiency of the heat exchange tubes. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a three-dimensional structural schematic diagram of the utility model.

[0015] Figure 2 It is a schematic cross-sectional view of the three-dimensional structure of the utility model.

[0016] Figure 3 It is a schematic cross-sectional view of the three-dimensional structure of the reversing mechanism of the utility model.

[0017] Figure 4 It is a schematic cross-sectional view of the three-dimensional structure of the cleaning mechanism of the utility model.

[0018] Figure 5 It is a three-dimensional structural schematic diagram of the cleaning mechanism of the utility model.

[0019] The markings of the components in the accompanying drawings are as follows: 1. fixed frame, 2. box body, 3. air intake fan, 4. temperature sensor, 5. path plate, 6. heat exchange tube, 7. filter plate, 8. reversing mechanism, 81. rotating frame, 82. isolation ring, 83. water outlet, 84. ash hopper, 9. cleaning mechanism, 91. hydraulic cylinder, 92. cleaning plate, 93. vibration frame. DETAILED DESCRIPTION

[0020] Although the present invention may be described with respect to a specific application or industry, those skilled in the art will recognize the broader applicability of the present invention. Those of ordinary skill in the art will recognize that terms such as: above, below, upward, downward, etc. are used to describe the drawings and do not represent limitations on the scope of the present invention as defined by the appended claims. Any numerical designations such as: first or second are merely exemplary and are not intended to limit the scope of the present invention in any way.

[0021] A boiler high temperature gas waste heat recovery device, such as Figure 1 and Figure 2 As shown, it includes a fixing frame 1, a box body 2, an air intake fan 3, a temperature sensor 4, a path plate 5, a heat exchange tube 6, a filter plate 7 and a reversing mechanism 8. There are two fixing frames 1 on the left and right, and the box body 2 is rotatably connected between the fixing frames 1. The inner sides of the left and right parts of the box body 2 are rotatably connected to the air intake fans 3. The left and right parts of the box body 2 are connected to the temperature sensor 4. The inner side of the middle part of the box body 2 is connected to the upper and lower path plates 5. The path plates 5 are all L-shaped structures, which can guide the high-temperature gas and increase the contact and heat exchange time between the high-temperature gas and the heat exchange tube 6. Forty-two heat exchange tubes 6 are connected to the middle part of the box body 2, and the upper and lower sides of the middle part of the box body 2 are connected to the filter plates 7. A reversing mechanism 8 is provided on the box body 2.

[0022] like Figure 1 and Figure 3 As shown, the reversing mechanism 8 includes a rotating frame 81, an isolation ring 82, a water outlet 83 and an ash hopper 84. The rotating frame 81 is connected between the fixed frames 1, and the rotating frame 81 is located on the outside of the box body 2. Four water outlets 83 are connected to the rotating frame 81. The isolation ring 82 is connected to the outside of the middle part of the box body 2. Cover plates are provided on the inner sides of the left and right parts of the isolation ring 82, and the cover plates cooperate with the heat exchange tube 6. The left and right parts of the isolation ring 82 are provided with docking ports on the outer sides, and the docking ports cooperate with the water outlet 83. Ash hoppers 84 are connected to the upper and lower sides of the box body 2.

[0023] When using the utility model, first place the fixed frame 1 in the waste heat recovery area of ​​the high-temperature gas of the boiler, and then connect the box body 2 with the discharge pipe of the high-temperature gas of the boiler, so that the high-temperature gas generated by the boiler flows into the box body 2 from the left, and at the same time, start the air intake fan 3 inside the box body 2 to rotate, so as to assist the high-temperature gas to flow in the box body 2. When the high-temperature gas of the boiler flows in the box body 2, the flowing cooling water is passed into the heat exchange tube 6 from the water outlet 83 on the rotating frame 81, and then flows out from the water outlet 83 on the other side of the rotating frame 81, so that the heat in the high-temperature gas is transferred to the cooling water. When the high-temperature gas of the boiler flows in the box body 2, the path plate 5 guides the high-temperature gas to increase the contact time between the high-temperature gas and the heat exchange tube 6, so that the heat exchange between the high-temperature gas and the heat exchange tube 6 is complete, and the temperature sensor 4 on the box body 2 can detect the temperature before the heat exchange. The gas temperature after heat exchange can be detected. The waste heat recovery efficiency of the boiler high-temperature gas can be detected by the difference in gas temperature before and after heat exchange. When the cooling pipe through which cooling water flows needs to be inspected, the box body 2 is rotated ninety degrees on the fixed frame 1, so that the heat exchange tube 6 is rotated to a vertical state, and the isolation ring 82 is rotated, so that the docking port on the isolation ring 82 is docked with the water outlet of another group of cooling pipes, and then the cooling pipe that needs to be inspected is inspected, thereby achieving the effect of being able to replace the cooling pipe without stopping the machine, facilitating the inspection of the cooling pipe, and improving the waste heat recovery efficiency of the boiler high-temperature gas. In the process of waste heat recovery of the boiler high-temperature gas, impurities in the high-temperature gas will adhere to the inner wall of the box body and the heat exchange tube 6. In the process of rotation of the box body, some impurities will fall onto the filter plate 7 and be discharged from the ash hopper 84 after filtration.

[0024] like Figure 1 , Figure 4 and Figure 5 As shown, a cleaning mechanism 9 is also included, which includes a hydraulic cylinder 91, a cleaning plate 92 and a vibration frame 93. The left and right parts of the box body 2 are connected to two upper and lower hydraulic cylinders 91, and the telescopic ends of the hydraulic cylinders 91 are connected to the cleaning plates 92. The heat exchange tubes 6 are slidably connected to the cleaning plates 92. The inner sides of the left and right parts of the box body 2 are connected to two upper and lower vibration frames 93, and the vibration frames 93 are in contact with the cleaning plates 92. The vibration frames 93 are a wave-shaped structure and can vibrate by contacting and cooperating with the cleaning plates 92.

[0025] The cleaning mechanism 9 of the device can be used to scrape off impurities attached to the heat exchange tube 6. When it is necessary to clean the impurities attached to the path plate 5 and the box body 2, the hydraulic cylinder 91 on the box body 2 is started to push out the telescopic end of the hydraulic cylinder 91, so that the cleaning plate 92 slides forward to scrape off the impurities attached to the heat exchange tube 6. The scraped impurities are discharged from the ash hopper 84. When the cleaning plate 92 moves, it contacts and cooperates with the vibration frame 93, so that the vibration frame 93 vibrates, the box body 2 vibrates, and the impurities on the box body 2 are shaken off by the vibration, thereby scraping off the impurities attached to the heat exchange tube 6 and the box body 2, and avoiding the heat exchange efficiency of the heat exchange tube 6 from decreasing.

[0026] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of those skilled in the art without departing from the purpose of the present invention.

Claims

1. A boiler high temperature gas waste heat recovery device, characterized in that: The invention comprises a fixing frame (1), a box body (2), an air intake fan (3), a heat exchange pipe (6), a filter plate (7) and a reversing mechanism (8); the fixing frame (1) has two left and right parts; the box body (2) is rotatably connected between the fixing frames (1); the inner sides of the left and right parts of the box body (2) are both rotatably connected to the air intake fan (3); the middle part of the box body (2) is connected to a plurality of heat exchange pipes (6); the upper and lower sides of the middle part of the box body (2) are both connected to the filter plates (7); and the box body (2) is provided with a reversing mechanism (8) capable of switching the cooling pipes.

2. A boiler high temperature gas waste heat recovery device according to claim 1, characterized in that: It also includes a temperature sensor (4), and the left and right parts of the box body (2) are both connected to the temperature sensor (4).

3. A boiler high temperature gas waste heat recovery device according to claim 1, characterized in that: It also includes a path plate (5), wherein the inner side of the middle of the box body (2) is connected to two upper and lower path plates (5), and the path plates (5) are all L-shaped structures, which can guide the high-temperature gas and increase the contact heat exchange time between the high-temperature gas and the heat exchange tube (6).

4. A boiler high temperature gas waste heat recovery device according to claim 1, characterized in that: The reversing mechanism (8) comprises a rotating frame (81), an isolating ring (82), a water outlet (83) and an ash hopper (84). The rotating frame (81) is connected between the fixed frames (1), the rotating frame (81) is located outside the box body (2), a plurality of water outlets (83) are connected to the rotating frame (81), the isolating ring (82) is connected to the outside of the middle part of the box body (2), the isolating ring (82) is provided with a cover plate on the inside of the left and right parts of the isolating ring (82), the cover plate is matched with the heat exchange tube (6), the isolating ring (82) is provided with a docking port on the outside of the left and right parts of the isolating ring (82), the docking port is matched with the water outlet (83), and the upper and lower sides of the box body (2) are connected to the ash hopper (84).

5. A boiler high temperature gas waste heat recovery device according to claim 4, characterized in that: The heat exchanger also comprises a cleaning mechanism (9), which comprises a hydraulic cylinder (91), a cleaning plate (92) and a vibration frame (93). The left and right rear parts of the box body (2) are connected to two upper and lower hydraulic cylinders (91), the telescopic ends of the hydraulic cylinders (91) are connected to the cleaning plates (92), the heat exchange tubes (6) are connected to the cleaning plates (92) in a sliding manner, the inner sides of the left and right parts of the box body (2) are connected to two upper and lower vibration frames (93), and the vibration frames (93) are in contact with the cleaning plates (92).

6. A boiler high temperature gas waste heat recovery device according to claim 5, characterized in that: The vibration frame (93) is a wave-shaped structure.

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